MKAnnotation subclass issues

Question

I upgraded to Swift 1.2 last night, and I got a bug I really can't figure out. The below code worked fine in the previous version of Xcode and Swift.

//MARK: Annotation Object
class PointAnnotation : NSObject, MKAnnotation {
    var coordinate: CLLocationCoordinate2D
    var title: String
    var subtitle: String
    var point: Point
    var image: UIImage
    var md: String

    init(point: Point) {
        self.coordinate = point.coordinate
        self.title = point.title
        self.subtitle = point.teaser
        self.image = UIImage(named: "annotation.png")!
        self.point = point
        self.md = point.content
    }
}

On line 3, I get the somewhat hard to understand error Objective-C method 'setCoordinate:' provided by the setter for 'coordinate' conflicts with the optional requirement method 'setCoordinate' in protocol 'MKAnnotation' I tried changing variable names and such, but no help. Does anyone have any idea how to fix this?

The class is for annotations on my mapview.

Answer 1

If you do not require to change coordinates after initialization then you can use it that way. It works for me with Swift 1.2:

class CustomAnnotation : NSObject, MKAnnotation {
    let coordinate: CLLocationCoordinate2D
    var title: String

    init(coordinate: CLLocationCoordinate2D, title: String) {
        self.coordinate = coordinate
        self.title = title
    }
}